docs: def add_options(self):
          """ Add program options, must be called in script's addOptions().
          """
          # These options need to be conflict-free to the containing
          # script, i.e. avoid short options if possible.
          self.script.add_bool_option("-i", "--interactive",
              help="interactive mode (prompt before changing things)")
          self.script.add_bool_option("--yes",
              help="positively answer all prompts (e.g. --delete --yes)")